External hard drive is not readable on Mac, how to recover data from it?

Recently, I accidentally removed my WD hard drive 1TB while watching a video on my MBA. The video was located in my external hard drive. When I connected my external hard drive back to my MBA, the following message appeared. I chose eject and tried again. The same message appeared, even after several more times trying. I haven't click initialize, because I know that will make my data lost. But whether I have lost all data when external hard drive is not readable on Mac? If I have, how can I recover data from unreadable external hard drive?

External hard drive not readable on macOS often caused by improper operation, virus infection, internal file system errors, etc. and such external hard drive not readable error cannot be repaired by Disk Utility sometimes. What's worse, we cannot access the data after our external hard drive is not readable. However, the data is very important for us, so we have to recover data from unreadable external hard drive firstly, and then fix the external hard drive unreadable error by reformatting. As for data recovery, iBoysoft Mac Data Recovery is highly recommended to recover data from unreadable Mac external hard drive.

How to recover data from unreadable external hard drive on Mac?

iBoysoft Data Recovery is a professional and safe Mac data recovery software that designed to recover lost data from hard drive, external hard drive, SD card, USB drive, memory card and other storage media on Mac, no matter those drives are formatted, inaccessible, unreadable, unmountable or corrupted, iBoysoft Mac Data Recovery performs recovery with ease.

Step 2: Connect unreadable external hard drive to Mac.

Step 3: Launch iBoysoft Mac Data Recovery.

Step 5: Preview the searching results, choose files we need and then click "Recover" to recover them from external hard drive that is not readable on Mac.

After recovering data from unreadable external hard drive, we can fix the external hard drive unreadable error by reformatting: Launch Disk Utility and run "Erase" to format that unreadable external hard drive on Mac, then it will be readable after reformatting completes.